USN-8403-1

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/notices/USN-8403-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8403-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8403-1
Upstream
Related
Published
2026-06-08T14:28:06Z
Modified
2026-06-30T18:17:24.566091908Z
Summary
isc-kea vulnerability
Details

Ali Norouzi discovered that Kea DHCP did not properly handle maliciously crafted messages over configured API sockets and HA listeners. A remote attacker could possibly use this issue to cause Kea DHCP to crash, resulting in a denial of service.

References

Affected packages

Ubuntu:24.04:LTS / isc-kea

Package

Name
isc-kea
Purl
pkg:deb/ubuntu/isc-kea?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.4.1-3ubuntu0.2

Affected versions

2.*
2.2.1-3
2.4.0-1
2.4.1-1
2.4.1-2build1
2.4.1-3build1
2.4.1-3build3
2.4.1-3build3.1
2.4.1-3ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kea",
            "binary_version": "2.4.1-3ubuntu0.2"
        },
        {
            "binary_name": "kea-admin",
            "binary_version": "2.4.1-3ubuntu0.2"
        },
        {
            "binary_name": "kea-common",
            "binary_version": "2.4.1-3ubuntu0.2"
        },
        {
            "binary_name": "kea-ctrl-agent",
            "binary_version": "2.4.1-3ubuntu0.2"
        },
        {
            "binary_name": "kea-dhcp-ddns-server",
            "binary_version": "2.4.1-3ubuntu0.2"
        },
        {
            "binary_name": "kea-dhcp4-server",
            "binary_version": "2.4.1-3ubuntu0.2"
        },
        {
            "binary_name": "kea-dhcp6-server",
            "binary_version": "2.4.1-3ubuntu0.2"
        },
        {
            "binary_name": "python3-kea-connector",
            "binary_version": "2.4.1-3ubuntu0.2"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8403-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:24.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-3608",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:25.10 / isc-kea

Package

Name
isc-kea
Purl
pkg:deb/ubuntu/isc-kea?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.6.3-2ubuntu0.1

Affected versions

2.*
2.6.1-1
2.6.1-2
2.6.3-1
2.6.3-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kea",
            "binary_version": "2.6.3-2ubuntu0.1"
        },
        {
            "binary_name": "kea-admin",
            "binary_version": "2.6.3-2ubuntu0.1"
        },
        {
            "binary_name": "kea-common",
            "binary_version": "2.6.3-2ubuntu0.1"
        },
        {
            "binary_name": "kea-ctrl-agent",
            "binary_version": "2.6.3-2ubuntu0.1"
        },
        {
            "binary_name": "kea-dhcp-ddns-server",
            "binary_version": "2.6.3-2ubuntu0.1"
        },
        {
            "binary_name": "kea-dhcp4-server",
            "binary_version": "2.6.3-2ubuntu0.1"
        },
        {
            "binary_name": "kea-dhcp6-server",
            "binary_version": "2.6.3-2ubuntu0.1"
        },
        {
            "binary_name": "python3-kea-connector",
            "binary_version": "2.6.3-2ubuntu0.1"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8403-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:25.10",
    "cves": [
        {
            "id": "CVE-2026-3608",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}